【c++】模拟实现boost库里的scoped_ptr

//模拟实现boost下的scoped_ptr

#include <iostream>
#include <assert.h>
using namespace std;

template <class T>
class scoped_ptr
{
private:
T * px;

scoped_ptr(scoped_ptr const &);
scoped_ptr& operator=(scoped_ptr const &);

void operator==(scoped_ptr const &)const;
void operator!=(scoped_ptr const &)const;
public:
scoped_ptr(T *p = 0) :px(p)
{}

//从auto_ptr获得指针的管理权
scoped_ptr(std::auto_ptr<T> p) :px(p.release())
{}

~scoped_ptr()
{
delete px;
}

// 删除原来的指针，保存新的指针
void reset(T * p = 0)
{
assert(p == 0 || p != px);
scoped_ptr<T>(p).swap(*this);
}

T& operator*()const
{
assert(px != 0);
return *px;
}

T* operator->()const
{
assert(px != 0);
return px;
}

T* get()const
{
return px;
}

void swap(scoped_ptr & b)
{
T *tmp = b.px;
b.px = px;
px = tmp;
}
};

int main()
{
int *p = new int(10);
scoped_ptr<int> ptr(p);
cout << *ptr << endl;
return 0;
}